Automatic chuck.



* 1mm?:cii'ruoer,ornnwiinmrrnw innsn'r; assre vcn, BYMESNE nssremr :mnrssnmaacn- CATUGCI manura'crunme: COMPANY, "A connomrron or .EW

f zen of the United States, residing in the city ofNewark," county of ,Essex, and State of New Jersey, have invented certain new and useful Improvements in Automatic Chucks; and'l do 'declarethe following to he. a full,

clear, and exact description-of the' same such as will enable others skilled inl-the-art to which; it appertains to make, construct,

' receive the shanks ofthe chuck jaws? The and use the same.

The object ofmy invention is to provide 7 a, chuck for lathesvor power drills of such a". character that when running at full speed, the workpiece shall be firmly held in posi I 'tion in the chuck, while a material reduction" of speedof therotating lathe or drill spindle 'will result in automatically releasin the.

" work piece from the chuck and permitthe operator to placea new work piece therein; or in case of the use of the device as an automaticdrill chucln'the reduction of the speed of the drillspindle will cause an automatic 25 ,releaseof the drill held in the chuck, andthereby permit the operator-to replace such drill withanother of different size if de:

sired.

As a lathe .chuck,the device will find itsfullest'usefulness where a large number of,

work piecesare-to be operated upon bythe same kind of a'tool and for the same pur-i pose, such tool beingnormally held in the 7 namely; drill chuc'ks and lathe chucks.

In] the drawing accompanying this appli cation and forming a part hereof, Figure 1.

illustrates 'in.--vertical section a lathe head stock with my improved drill chuck in posinon; Fig. 2. illustrates a front end view of the, latl1'echu ck proper. Fig.3. illustrates the principle applied to a vertical drill spine *dle. Fig; 4.- illustrates av modified-form of,

chuck jaw.

j Similar 'numerals refer to like parts throughout-the specification and drawing.

[ The lathehead stock 1, is of any usual-or preferred construction, provided with bear-.

,ings 2, 3, in the upperparts of the vertical stanchions The usual hollow spindle 4, is :niounted in the-bearings 2, 3, such spindle: carrying thecone pulley 5 in any usual or v Be 't knownthat I, PLINY CA'I'UCCI, a citiau'roirarrro oin-10x1, [j 5 {preferred manner. At the .:forward end of thGSPllldlQ '4,"1slocated thexchu'ck head 6,

which in the present case is provided with .the three diagonally disposed chuck jaws '7, which are located within the conical opening :8, of thej'chuck heads Within this opening 8, sa cone block 9, nicely fitted-to the conicalopening-8, and held in position by the screws. '10. At uniform intervals around the cone block 9, are the .Several'channels 11 to into an innera'perture 15, ingthe-cone block .9. The chuck head-6, is screwedupon the outer projecting end of the spindle 4,-in the usual manner with a washer 16,'located .between the end of the spindleand an interior shoulder 17 of a the chuck block. This washer receives the rear] end of the spindle 15, which isguided thereby. Between :this washer l6, andthe collar 12, I- locate aheavy spring 18, the tendencyof which is to rforce the spindle 14, and with it the chuck jaws 7 outwardly, thereby separating such chuck Sp n f Letters e aPatented Aiigfi, 91 2. a mica' ioimea'ma .15,1911.: Serial-Ho. 627,311;

jaws.' In the opposite end of thespindle 14,

I-mount a thinible l9, suchthimble being 585 held in the spindle in any suitable manner, as by splining .it-to the-spindle. Thisthimble 19, is providedwith a pair of apertured lugs 20 in whichare mounteda pair of can-.

trifugal weightedarms, 21, such arms being provided at their inner ends'with the jaw 22 which takes lover. an. adjustable. collar 23, screwed on to the end iofjthe rod, 94, -the'latter passing through the thimble 19,- through the hollowof the spindle 4, and secured in any convenientmanner-to the inner end of the chuck spindle 14, for example, by screw: ing the same therein. V y

The operation of this structure isas .follows: The spring 18,-is of suficient tension,

as heretofore described, to force the spindle r 14, and with it the chuck jaws 7, outwardly so as to separate the same, and permittheinsertion of a work .piecewithin said aw. Therapid rotation of the spindle 4, through .a driving belt mounted' upon the cone pulley 195 5, ;will cause the centrifugal weighted arms 21 to .flyv outwardly and thereby act upon the rod 24,-to pull the chuck spmdle 14 in- ;w ardly-and'with -it --the chuck gaws 7,430 as togrip firmly the work piecedwithin said jaws, and the-more rapid the rotationof the spindle 4, the more firmly will the work piece be gripped within the jaws, this of course, being due to the action of the centrlfugal weighted arms '21.. When itis desired to remove the work piece fron the chuck, it; is only necessary for the -operator.

to check the speed of the cone 5, and spindle 4, when, of course, the spring 18, will" exert its vforceto drive the spindle 14 outwardly,

thereby drawing the-weighted arms 21 to- "ward each other, and thus separate the The structure of the drill spindle as illus- IS-trated in Fig. 3 is identical with that illustrated in connection' with the lathe spindle in Fig. 1, with theexception that such drill spindle is' vertically slidable as is well-known in tools of this character, and'I do not deem it necessary to' give a more specific description of the same, other than to state that the vertical sliding of the drill spindle 25, is accomplished through the medium ofthe lever26. In the form of chuck illustrated in Fig. 4:,

' "the chuck block 27, isof usual type, and securedto the end of the chuck spindle 4c, ""in the ordinary manner, with the heavy spring 28, located between the'collar 29,

i upon the rod 30, and the end of the spindle 4. YAsecond collar 31 is also secured to the rod 30, at its outer end, and this collar receives the notches 32 in the rear ends of the tapered chuck jaw 33, the'latter projecting 35 without the chuck block 27, and bearing upon the tapering opening 34 in said chuck block. It will be readily'seen that if this formofchuckblock is substituted for the form illustratedin-Fig. 1, the action of the 40' weighted arms 21, will draw the chuck ,jaw 33,-into the chuck block 27, and through the tapering of such chuck jaws will cause such 4 jaws to approach each other, and thus grip firmly any tool or work piece inserted between them. As above indicated any material reduction in the rotation of the spindle 4, will permit the spring 28, to act upon the. rod';30,'and thus force the same outwardly and with it the jaw 33, and thereby 5 0'release the tool or work piece.

I claim. v e 1. In an automatic chuck, the combination of a hollow rotatable spindle, a chuck head secured to one end of said-spindle,

chuck jaws mounted in said head, spring mechanism for separating said jaws, and centrifugal mechanism secured to the opposite. end of said spindle 'and connected to said jaws to draw them together upon the I rapid rotation of said spindle against the action of said spring mechanism.

1 2. In an automatic chuck,the combination:

.wh'ereby'the centrifugal action of said arms for separating said jaws, a-pair of weighted whereby thera'pid rotation of said spindle 7O thereon to rotate therewith, jaws mounted.

in said head, automatic means foriseparating said jaws upon the checking or stopping of the rotation of said spindle to receive a workpiece or tool, and a'centritugal device secured upon said spindle for actuating said jaws to cause them to draw together and grip a work piece or tool.

4. In an automatic chuck, the combination of a rotatable chuck spindle, a chuck head mounted thereon, chuck aws mounted in said head, automatic spring mechanism for causing said jaws to separate to receive a work piece or tool when the rotation of said spindle is checked or stopped, a. pair of centrifugal weighted arms pivotally secured to said spindle to rotate therewith, a rod connecting said jaws with said arms,

will cause said jaws to draw together and 9 0 grip a work piece or tool there between.

' 5. In an automatic chuck, the combination of a hollow spindle, a chuck head secured' to one end of said spindle, diagonally disposed, slidable jaws mounted in said head, 95. automatic spring mechanism within said head for separating said jaws when, the rotation of said spindle is checked or stopped, a pair of weighted gentrifugal 'arms pivotally secured to the opposite end of said spindle, a rod extending through said spindle and connecting said jaws with said arms, whereby the rapid rotation of said arms will draw said jaws toward each other. 6. In an automatic chuck, the combination of ahollow spindle, a chuck head secured to one end of said spindle diagonallydisposed, slidable jaws mounted in said head, spring mechanism within said head .11( centrifugal arms pivotally'secured to the 'opposite end of said spindle, arod extending through said spindleandconnected at one.

end with said jaws, and adjustably connected at its other end with said arms, 11%

and arms will draw said jaws toward each other and the checking or stopping of such rotation will separate said aws.

PLINY OAIUGOI.

; Witnesses":

NORMAN E. 'Znsr,

LOUIS M. SANDERS. 

